398921421454 has 8 divisors (see below), whose sum is σ = 601065460800. Its totient is φ = 198566267856.

The previous prime is 398921421389. The next prime is 398921421461. The reversal of 398921421454 is 454124129893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447220879 + ... + 447221770.

It is an arithmetic number, because the mean of its divisors is an integer number (75133182600).

Almost surely, 2^398921421454 is an apocalyptic number.

398921421454 is a deficient number, since it is larger than the sum of its proper divisors (202144039346).

398921421454 is a wasteful number, since it uses less digits than its factorization.

398921421454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894442874.

The product of its digits is 2488320, while the sum is 52.

The spelling of 398921421454 in words is "three hundred ninety-eight billion, nine hundred twenty-one million, four hundred twenty-one thousand, four hundred fifty-four".